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Sleep psychology is a specialty that developed from the need to better understand and treat sleep and sleepârelated disorders. The specialty requires a broad understanding of: 1  Normal and disordered sleep. 2  Sleep physiology.3  The effects of sleep medications on the brain.4  Sleep cycles.5  Sleep changes related to age.leep psychology is a specialty that developed from the need to better understand and treat sleep and sleepârelated disorders. The specialty requires a broad understanding of: 1  Normal and disordered sleep. 2  Sleep physiology. 3  The effects of sleep medications on the brain. 4  Sleep cycles. 5  Sleep changes related to age.
Sleep disorders are a group of syndromes characterized by disturbance in the patient's amount of sleep, quality or timing of sleep, or in behaviors or physiological conditions associated with sleep. There are about 70 different sleep disorders.iagnosis of sleep disorders usually requires a psychological history as well as a medical history. With the exception of sleep apnea syndromes, physical examinations are not usually revealing. The patient's sex and age are useful starting points in assessing the problem.